mechohaulic Posted March 2, 2022 Share Posted March 2, 2022 breaking ring wasn't really the issue ; melting pistons was 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-490765 Share on other sites More sharing options...
mrsmackpaul Posted March 3, 2022 Share Posted March 3, 2022 Maybe put a O2 censor in the exhaust when you get it all back together to see how it is running Gotta remember these are big pistons compared to a car so when she pings its gunna be huge So timing would be critical as would mixture Paul 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-490777 Share on other sites More sharing options...
doubleclutchinweasel Posted March 3, 2022 Share Posted March 3, 2022 16 hours ago, mechohaulic said: breaking ring wasn't really the issue ; melting pistons was That's what I'm thinking. The broken rings may have been a secondary symptom. Melting pistons points to a combination of too much timing and too lean a mixture. There's nothing like having Wiseco dripping out of the exhaust pipe! Sounds like he has a plan for the next go-round though! 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-490796 Share on other sites More sharing options...
mackdump600@yahoo.com Posted March 3, 2022 Author Share Posted March 3, 2022 Thanks everyone for posting your thoughts about this,I will let everyone know when I get it back in 👍👍🙏 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-490817 Share on other sites More sharing options...
mowerman Posted March 3, 2022 Share Posted March 3, 2022 must have been pretty heartbreaking for you,,,all those brand new parts and time invested to go south on you.....lets all hope this time were all set...bob 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-490818 Share on other sites More sharing options...
mechohaulic Posted March 4, 2022 Share Posted March 4, 2022 3 hours ago, mackdump600@yahoo.com said: Thanks everyone for posting your thoughts about this,I will let everyone know when I get it back in 👍👍🙏 updates are always a positive. one thing i've noticed on this site is with so much helpful information being shared ; rarely see updated messages letting the responders know results of their help. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-490828 Share on other sites More sharing options...
mowerman Posted March 4, 2022 Share Posted March 4, 2022 hey mackdump,i was just curious,,,,is that Rmodel,what your working on????bob Quote Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-490884 Share on other sites More sharing options...
mackdump600@yahoo.com Posted March 11, 2022 Author Share Posted March 11, 2022 Yes mowerman a 70R 608 fire truck I removed the pump and bed had a 14 ft dump on. It took it off and am building a pickup style bed on it now. Will get some pictures of it on here soon thanks Quote Link to comment https://www.bigmacktrucks.com/topic/69311-707-gas-engine-rings-breaking/page/2/#findComment-491615 Share on other sites More sharing options...
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